One-piece seat shell

ABSTRACT

A one-piece seat shell having a backrest and a seat connected by an angled transition section that contains a plurality of slots to permit resilient deflection of the backrest with respect to the seat.

My invention pertains to a one-piece seat shell having a backrest and aseat connected by a curved transition section.

SUMMARY OF THE INVENTION

My invention pertains to a one-piece seat shell having a backrest and aseat connected by a curved transition section that permits resilientdeflection of the backrest with respect to the seat.

BRIEF DESCRIPTION OF THE DRAWING

The drawing is a perspective view of the one-piece seat shell.

DESCRIPTION

The drawing shows a seat shell 10 made of rigid basic material (forexample plywood) having a backrest 12, a seat 14 and an angledtransition region 16 connecting the two. A plurality of slots 18' areprovided in the transition region 16 and optionally also in the adjacentregion of the backrest 12 and the seat 14. Slots 18' extend in thetransverse direction and extend parallel to each other. Some slots maybe inclined at a slight angle, in the manner of a pencil of rays. Theslots 18' facilitate a resilient deflection of the backrest 12 withrespect to the seat 14.

The area indicated by broken lines 20' defines the region 22 of the seatshell which is subject to spring action or resilient deflection. Theslots can be covered by easily cut coverings.

I claim:
 1. A one piece seat shell (10) comprising(a) a backrest (12),(b) a seat (14), (c) a curved transition section (16) smoothly andarcuately interconnecting the backrest (12) and the seat (14), (d) twogroups of parallel slots (18'), each group extending inwardly from alaterally exterior edge of said transition section (16), the slots (18')in each group(i) extending in a transverse direction, (ii) being ofdifferent lengths, (iii) having outer open ends and closed inner ends,(iv) the closed inner ends of said two groups of slots (18') definingbetween them an intermediate transition region (22) of the seat shell(10)which transition region (22) is effective to provide a springaction, and which transition region (22) diverges from a transversecenter line of said transition region (22) both outwardly towards saidbackrest (12) and outwardly towards said seat (14).